Just chalk it up to Rosado going from fighting regular guys at 154, to fighting the hardest hitting titleholder at 160. News flash: GGG hits a whole lot harder than anyone Rosado had been in the ring with. Especially his jab, and his power jab is one of his signature punches. GGG power jab is not just a poke, it starts at his feet and pushes his entire body into the punch. GGG power jab is probably the rough equivelant to a straight punch from the regular 154 joes Rosado had fought.
[yt]-ImRf3-NOCo[/yt] [yt]YCKN3M3Nnfo[/yt] [yt]qBc0c9CEPcg[/yt] 3:05 [yt]NtSJXPntJkQ[/yt] "Golovkin hits like a sledgehammer" -- Sergey Kovalev
No, he just likes to target the top of the head and the side of the head/behind the ear, he has that science down to a tea on his hooks, it is easier to defend against chin shots than those kind of shots.